Helping others can make us very happy.
A. feel B. feeling C. to feel
---This computer is really cheap.
---The_____, the better. I need money, you know.
A. cheapest B. cheap C. cheaper
He is ________to reach the apple on the tree.
A. enough tall
B. tall enough
C. thin enough
--- Are you ______ from America？ --- No, none of us.
A. both B. all C. any
In our library there are many _____books and newspapers.
A. kinds B. kind of C. kinds of